Unitil Completes Acquisition of Two New Hampshire Water Utilities
Unitil Corporation has finalized its purchase of two Aquarion water companies in New Hampshire, closing a deal first announced in May 2025.
Unitil Corporation, the New Hampshire-based publicly traded utility, has completed its acquisition of Aquarion Water Company of New Hampshire and Abenaki Water Co. from the Aquarion Water Authority, the company announced on June 30, 2026. The transaction marks a meaningful expansion of Unitil's regulated utility portfolio beyond its traditional electricity and natural gas operations into the water sector.
The deal's origins trace back to a Stock Purchase Agreement first disclosed in May 2025, though the arrangement evolved over time. A subsequent amendment narrowed the scope of the transaction, limiting Unitil's purchase specifically to the two New Hampshire-based water companies rather than a broader set of assets originally contemplated under the agreement. That kind of mid-process scoping adjustment is not uncommon in regulated utility acquisitions, where state oversight and asset complexity can reshape deal structures before closing.
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Completion of the transaction required regulatory sign-off from both the New Hampshire and Maine Public Utilities Commissions — a dual-state approval process reflecting the geographic footprint of the regulated water assets involved. The fact that both commissions cleared the deal signals that regulators found the ownership transfer consistent with the public interest standards that govern utility acquisitions in those states.
For Unitil, which trades on the NYSE under the ticker UTL, the acquisition represents a diversification into water utility operations, a segment that has attracted considerable interest from established energy utilities in recent years as investors seek stable, rate-regulated cash flows. Water infrastructure, like electricity distribution, tends to generate predictable returns under regulatory frameworks designed to balance shareholder interests with consumer protection. Whether this transaction signals further water-sector ambitions for Unitil remains to be seen, but it positions the company as a multi-commodity regulated utility for the first time.
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